What Plants Need
<ul><li>Nitrogen </li></ul><ul><li>-Nitrogen is found in the chlorophyll molecule which is important for photosynthesis </...
<ul><li>Phosphorus </li></ul><ul><li>-P is found in many molecules (DNA, RNA, ATP, cell membrame) </li></ul><ul><li>-impor...
<ul><li>Potassium </li></ul><ul><li>-helps with protein synthesis </li></ul><ul><li>-important in plant growth </li></ul><...
<ul><li>Magnesium </li></ul><ul><li>-important for photosynthesis (found in chlorophyll) </li></ul><ul><li>Deficiency </li...
<ul><li>Calcium </li></ul><ul><li>-develops healthy cell walls </li></ul><ul><li>Deficiency </li></ul><ul><li>-unable to g...
Agricultural Revolution <ul><li>-the change in people’s way of life. </li></ul><ul><li>-the ability to control the growth ...
Nomadic Hunter Gatherers <ul><li>Knowledge: knew which plants were edible, what parts were edible, where they grew and wha...
Monoculture <ul><li>One crop is planted  </li></ul><ul><li>Maximizes the amount of food </li></ul><ul><li>Problems (soil n...
Possible solution <ul><li>Crop Rotation – alternating different plants year after year that require different nutrients to...
Farm Manure – rich in N, P, K <ul><li>Advantages </li></ul><ul><li>-manure is natural and easily obtained </li></ul><ul><l...
Potential Problems <ul><li>Difficult to distribute nutrients evenly </li></ul><ul><li>Large volume of manure is required (...
Alternative Pest Control Technology <ul><li>Mechanical Control – trapping, catching, picking off unwanted pests. </li></ul...
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03 what plants need

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Transcript of "03 what plants need"

  1. 1. What Plants Need
  2. 2. <ul><li>Nitrogen </li></ul><ul><li>-Nitrogen is found in the chlorophyll molecule which is important for photosynthesis </li></ul><ul><li>-nitrogen is also found in proteins </li></ul><ul><li>-gives plants dark green colour </li></ul><ul><li>Deficient </li></ul><ul><li>-plants have yellow leaves and stunted growth </li></ul>
  3. 3. <ul><li>Phosphorus </li></ul><ul><li>-P is found in many molecules (DNA, RNA, ATP, cell membrame) </li></ul><ul><li>-important in protein synthesis during plant growth </li></ul><ul><li>Deficiency </li></ul><ul><li>-plants grow slower </li></ul><ul><li>-young leaves are grey in colour </li></ul><ul><li>-older leaves are red in colour </li></ul>
  4. 4. <ul><li>Potassium </li></ul><ul><li>-helps with protein synthesis </li></ul><ul><li>-important in plant growth </li></ul><ul><li>-disease resistance </li></ul><ul><li>-improves quality of plant seeds </li></ul><ul><li>Deficiency </li></ul><ul><li>-plants don’t grow </li></ul><ul><li>-older leaves turn brown and die </li></ul>
  5. 5. <ul><li>Magnesium </li></ul><ul><li>-important for photosynthesis (found in chlorophyll) </li></ul><ul><li>Deficiency </li></ul><ul><li>-leaves are yellow with green veins </li></ul>
  6. 6. <ul><li>Calcium </li></ul><ul><li>-develops healthy cell walls </li></ul><ul><li>Deficiency </li></ul><ul><li>-unable to grow new leaves, stems and roots </li></ul>
  7. 7. Agricultural Revolution <ul><li>-the change in people’s way of life. </li></ul><ul><li>-the ability to control the growth of plants for food. </li></ul>
  8. 8. Nomadic Hunter Gatherers <ul><li>Knowledge: knew which plants were edible, what parts were edible, where they grew and what time of year the plants could be harvested. </li></ul><ul><li>Tools: for digging edible roots, harvesting seeds and grinding seeds in an edible form. </li></ul>
  9. 9. Monoculture <ul><li>One crop is planted </li></ul><ul><li>Maximizes the amount of food </li></ul><ul><li>Problems (soil nutrients are depleted) </li></ul><ul><li>-if the land is used year after year for the same crop, the same minerals will be depleted that the plant needs. </li></ul><ul><li>-eventually the soil becomes unusable </li></ul>
  10. 10. Possible solution <ul><li>Crop Rotation – alternating different plants year after year that require different nutrients to sustain the crop. </li></ul><ul><li>Eg. Planting legumes one year. How is this beneficial? Think back to grade 10 Ecology. </li></ul><ul><li>Farm manure </li></ul><ul><li>Green manure </li></ul><ul><li>Fertilizers </li></ul>
  11. 11. Farm Manure – rich in N, P, K <ul><li>Advantages </li></ul><ul><li>-manure is natural and easily obtained </li></ul><ul><li>-manure needs to be disposed of </li></ul><ul><li>-decomposes and forms humus (increases the soil’s ability to absorb and retain water. </li></ul><ul><li>-rich in N, P, K </li></ul>
  12. 12. Potential Problems <ul><li>Difficult to distribute nutrients evenly </li></ul><ul><li>Large volume of manure is required (strong smell) </li></ul><ul><li>High levels of E.Coli (compromise water safety) </li></ul><ul><li>Need to be stored to avoid nutrient loss from rain </li></ul><ul><li>Cost of labour </li></ul>
  13. 13. Alternative Pest Control Technology <ul><li>Mechanical Control – trapping, catching, picking off unwanted pests. </li></ul><ul><li>Cultural control – crop rotation </li></ul><ul><li>Sex attractant control – sterilizing male insects in a lab using radiation. Females mate with sterile males and produce infertile eggs </li></ul><ul><li>Biological Control – using pests natural enemies to reduce the population. Ladybugs to eat aphids. Marigolds due to their strong smell. </li></ul>

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